我的数据集有大约200000行。在pig中使用下面的命令，我试图删除空值，但是得到了错误的输出。我错过了什么？请帮忙。

我用过

div = Foreach dataset generate $43 as A,$44 as B,.....,$50 as H;

并尝试消除空值以查找单个变量计数以及总计数。

values = filter div by A is not null AND B is not null AND C is not null AND D is not null AND E is not null AND F is not null AND G is not null AND H is not null;

输出错误。

我希望最终输出像h 1056 u 4355 w 999 p 1000 y 2199